Controllable thermochromic luminescence in SrMoO4: Eu/Tb by nonradiative relaxation and local symmetry for anti-counterfeiting and high-temperature sensing applications

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2025-09-18 DOI:10.1016/j.optmat.2025.117534

Aihua Zhou , Chengguo Ming , Yumiao Pei , Yuanxue Cai , Tingting Guo , Hanbo Li

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引用次数: 0

Abstract

Reasonable modulation of temperature-dependent luminescence color has attracted significant attention due to its promising applications in anti-counterfeiting and temperature sensing. Although research on thermochromic materials is growing, the detailed exploration of the causes remain insufficiently explored. In this study, we successfully synthesized SrMoO₄:Tb/Eu samples exhibiting thermal-responsive color tuning. Under 280 nm excitation, the intensity ratio of Eu³⁺(⁵D₀→⁷F₂) to Tb³⁺ (⁵D₄→⁷F₅) in SrMoO₄:0.08Tb/0.12Eu gradually increases from 0.81 to 5.8 over the temperature range of 303K–573K, accompanied by a distinct color shift from red to yellow. Experimental investigations demonstrated that the thermochromic behavior of the sample is primarily governed by nonradiative relaxation rates and local site symmetry. These results indicated that the samples can have potential for anti-counterfeiting and temperature sensing, particularly suitable as temperature sensing in the high-temperature reactor observation window.

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基于非辐射弛豫和局部对称的SrMoO4: Eu/Tb可控热致变色发光防伪和高温传感应用

合理调制温度相关的发光颜色在防伪和温度传感等方面有着广阔的应用前景。虽然对热致变色材料的研究越来越多，但对其成因的详细探讨还不够。在这项研究中，我们成功地合成了具有热响应性颜色调谐的SrMoO4:Tb/Eu样品。在280 nm激发下，SrMoO4:0.08Tb/0.12Eu中Eu3+（5D0→7F2）与Tb3+ （5D4→7F5）的强度比在303K-573K温度范围内由0.81逐渐增大到5.8，并伴有明显的由红到黄的颜色变化。实验研究表明，样品的热致变色行为主要受非辐射弛豫速率和局部位置对称性的控制。结果表明，该样品具有防伪和温度传感的潜力，特别适合作为高温反应器观测窗口的温度传感。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.